First slide

P-N junction

Question

A potential barrier of 0.50 V exists across a P-N junction. If the depletion region is $5.0 x 10^{- 7}$ m wide, the intensity of the electric field in this region is

Moderate

A

$1.0 \times 10^{6} V / m$
B

$1.0 \times 10^{5} V / m$
C

$2.0 \times 10^{5} V / m$
D

$2.0 \times 10^{6} V / m$

Solution

$E = \frac{V}{d} = \frac{0.5}{5 \times 10^{- 7}} = 10^{6} V / m$

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